// JavaScript Document
function isMouseLeaveOrEnter(e, handler)//禁止pop事件
{  
	if (e.type != 'mouseout' && e.type != 'mouseover') return false;  
	var reltg = e.relatedTarget ? e.relatedTarget : e.type == 'mouseout' ? e.toElement : e.fromElement;  
	while (reltg && reltg != handler)  
		reltg = reltg.parentNode;  
	return (reltg != handler);  
} 